|
|
Tx27 Transmitter Kit
|
 |
DESCRIPTION:
This kit includes the core components to make a Tx27 transmitter.
Tx27 is a hand-held wireless transmitter intended to control model railway points, lights, etc.
KIT CONTENTS:
| Qty | Item | |
| 1 | Small plastic box | |
| 7 | 2-way toggle switch | |
| 1 | On/Off pushbutton with Led | |
| 1 | Bind pushbutton | |
| 2 | 10k resistor | Brown-Black-Orange-Brown |
| 1 | 1k resistor | Brown-Black-Red-Brown |
| 1 | PP3 plug | |
| 1 | Tx2 | |
| 50mm | 30mm heatshrink for Tx2 | |
| 1 | Plastic sheet for battery compartment | |
| 1 | Wiring diagram | |
| 1 | Drill template | |
| 1 | This page (www.DelTang.co.uk/tx27a-kit.htm) |
OTHER ITEMS NEEDED:
PP3 9v battery, hookup wire.
Solder, Iron, Multimeter, Glue, heat-shrink tubing, Drills, Files, Knife, Screwdrivers etc.
CIRCUIT DIAGRAM:
Tx27 circuit
DRILL TEMPLATE:
Tx27 layout
NOTES:
1. The circuit diagram shows the required connections.
2. The 'Tx2' radio module is usually powered with a 9v battery. Some exceed 10v when new which exceeds the Tx2 specification. So the supplied 1N4148 diode is an optional component used to reduce the battery voltage by about 1v.
3. Tx2 has an on-board regulator which provides a 3.1v reference voltage to the other components.
4. The 2 longer wires in the middle of the on/off switch are 'Led2'. The shorter of those is marked '-' and goes to negative.
5. The on/off switch has an anti-rotation ridge that makes its diameter larger at that point. File a notch in the box to avoid crushing the switch.
6. The Tx2 module can be protected with with the heatshrink covering provided.